Taken from Forbes.com:
Angry Birds Transformers 1.6.11
Following recent Angry Birds 2 and Lego Angry Birds news, there is an update for Rovio’s popular tap and shoot game, Angry Birds Transformers, that adds crafting and characters.

In Angry Birds Transformers (iTunes) you play as different Transformer and Decepticon characters each depicted as either birds or pigs. The latest update adds a raft of new features. Firstly, long awaited character Bluestreak has been added, played by The Blues birds who also now appear as Prowl.


These characters have their own upgrade trees and special attacks that can be progressed through in-app purchases or performing well in the game. Both Bluestreak and Prowl are unlock in the Portal Missions.

More interesting for longstanding Angry Bird Transformer players is the addition of floating sentinel robots. These droids can be called in to assist during a level and act as autonomous side-kicks. A range of different “Energonicon” attack droids can be called in wielding fireballs, lightning storms, and 40 or so other unique skills.
Players create these droid helpers in Professor Pig’s Crafting Lab. The crafting element is a good addition and nods a wink at games like Minecraft and Terraria.
Providing parents are aware of the in-app purchases, Angry Birds Transformers continues to be a good choice for some family entertainment this holidays.